Benzoic acid is an important intermediate or monomer in the chemical industry, which has a wide range of applications in food, pharmaceutical and fine chemical industry. Generally, liquid phase catalytic oxidation of toluene is used to prepare benzoic acid, and distillation is used to separate the product of the reaction to get high-purity benzoic acid. Energy consumption of distillation accounts for a significant proportion in the total energy consumption of benzoic acid preparation process, so research on...